Holding means for brushes



NOV- '-1, 1932 L. B. TERHUNE HOLDING MEANS FOR BRUSHES Filed May 2s.1929 A TORNEY Patente-cl Nov. 1, 1932 UNrrED stares n @FFME LEONARD B.TERHUNE, OE NEWARK, NEW JERSEY, ASSGNOR TO DU PONT VISCOLOIDL v COMPANY,OF W'IL'MINGTON, DELAVARE, A CORPORATION OF DELAWARE HOLDNG MEANS EOEBRUSHES Application led May 23, 1929. SeralNO. 365,497.

My invention relates particularly to a holdler for supporting andholding in place a brush blank While being operated upon for drillingand filling with bristles, in all types of brushes.

The object of my invention is to provide a brush holder as abovereferred to, Which Will effectively hold a brush blank of any desiredcharacter rmly in place and With the desired exactness of location, Aandwhich will withstand the repeated usage of the holder With. succeedingbrush blanks Without shifting the" brush blank from its correct positionWhile being operated upon, as, for eX- ample, for drilling or lling Withbristles. The holders made in accordance With my invention areadapted-for use on brushes designedfor dierent purposes and which are,accordingly, of different shapes and sizes. Furthermore, they are soconstructed that While they are adapted to hold the brush blankaccurately in place,nevertheless abrush blank may be readily insertedand removed Without-.undue friction, but When in place therein the brushblank will be held firmly against any accidental Withdrawal of the same.Furthermore, the holder is so constructed as to accurately fit the facesof the brush blanks which ar'emade with regularity and uniformity, butneed'not closely lit the edgesof the brush blanksvvhich'are at timesvariable in dimensions due to the finishing of the brush.V Furthermore,a means is provided in connection With the holder for holding the sameaccurately in position in its carrier so that the latter need not bemade With very great accuracy.

While my invention may' be embodied in many different forms, for thepurposeA of illustration I have shoWn only certain forms of the saine inthe accompanying draWing,in which Fig. 1 is a vertical section of abrush holder made in accordance with my invention,V

showing the same as located' in a carrier providedfor supporting it; n

Fig. 2 is a verticalsection on line 2 2 of Fig. 1;

Fig. 3 -is a similar section taken on line 3 3 of Fig. 1;

chines, Serial No. 338,978, filed February 11, Y

1929, and my application upon drillingand inserting mechanism for brushmachines, serial No. 365,495, filed May 23, 1929. In the form of myinvention shovvn in these figures, l have shown, particularly in Figs. 1and 3, a movable carrier 1 Which corresponds to the movable carriage 9shown in my application Serial No. 338,97 8 labove referred to. Thiscarrierv is provided With a pivotal support 2 Which-corresponds to thesupport 13 in said application, a pivotal suport 3 being provided attheupper end Which corresponds to the support 12 inthe said application.This lcarrier has a tapered opening 4 having near lthe smaller endthereof a stop-pin 5 against which a brush holder 6, made preferably inthe form of a die-casting, is designed to rest for positioning the samelongitudinally of the carrier, although accurate` positioning of thesame-against said pin 5Y is not necessary` owing to the locating of theholder by the countersinks hereinafter referred to. The holder 6 isaccurately positioned by means of tvvo hardened steel gibs 7 and 8 Whichare` Wedge shaped and Which are designed for longitudinal adjustment bymeans of screvvs"9 screw-threaded therein and passing'through slots 10in the carrier 1 and having heads 11 Which are supported on elongatedrecesses 12 .f

in the sides of the carrier. By the adjustment of the gibs and theinsertion of the holder 6 by pushing the same forwardly against the pin5, the holder becomes iirredly and accurately held in place in thecarrier 1.

The portion of the holder 6 which is thusv held in the carrierV is arear extension 13 on the bottom of the holder having a recess 14:therein filled in With a plate 15 of hard rubber, bakelite, pyralin,`die-casting or hardi Cil v rubber, vulcanized to a hardness similar tothat used in motor mountings. Thisrubber lining 18 is held in place byreason of openings 20, not shown, which appear in the U-shaped wall 17and into which the rubber is inserted during the molding of the samewhen applying it to the holder. 'Ihe rubber used for this purpose willbe solid and not spongy, but will have a slight give, and may be said tobe comparable to the type of rubber used in automobile tire shoes. Itwill be noted, further, that the side walls of the body of rubber arethicker than the bottom wall, not shown, thereof so as to provideslightly more give to the sides than the bottom of the rubber lining,or, in other words, to provide a very solid support for the brush blankwhen being operated upon. In this way the drilling or filling isprevented from throwing the brush blank out of position but yet will notmar the brush blank, so that subsequent cleaning and wiping of thefinished brushes are unnecessary. A lip 21 is provided all around theupper edge of the rubber lining down to a point near the lower open endof the same where the rubber lining is provided with a narrow opening 22formed by two project-ions 23 in the rubber. The rubber lining at thisend of the holder isl held in` place by means of two flat springs 24which are secured by rivets or screws 25 to theholder. As shown in Fig.4, the lrubber lining fits the side and bottom faces o-f a brush blank25a but does not fit the lower edges of the brush blank inasmuch asthese edges vary in position due to the finishing operations of thebrush blanks.

The form of my invention shown in Fig. 5 is constructed in the same wayas above described, except that in this instance a holder 26 isprovided, having a curved recess 27 for receiving the brush blank and acurved plate 28 having appropriately located countersinks 29 therein,the inner ends of the recesses forming the countersinks being on thesame radius asthe face of the brush blank.

In the operation of my brush holder, it will be understood that thebrush blank 25a will be pushed into the holder 6 between the projections23 and beneath the lip 21, and the gibs 7 and 8 will be set up in suchaI manner as to tightly iit the sidesof the holder 6 when placed in thecarrier and resting against the face of the stop-pin 5. Owing to thefact that the sides of the carrier which support the gibs 7 and 8 arethin there will be a certain amount `of give in these sides of thecarrier so that the brush holder 6 will thus be tightly thermore allowfor diii'erences in the give andv strength ofthe Atwo sidesof thecarrier and the gibs can be set up so as to account forv wear andrepairs to be made in the sides of thev carriers. Also, they permitrecentering4 due to defects in the brush blanks, as, for eX- ample, verydefective die pressing. In this way the carrier itself does not have tobe made with great accuracy. Again, by constructing the holder in theabove manner with inserts in the base of the same for countersinks, vtheconstruction is quite inexpensive.

Therefore, the brush blanks may be, thus', readily and quickly insertedthrough the entry openings into the holder 6, especially in the type ofthe brush blank as shown in the drawings, as the opening 22 is as wideas vthe innermost width between the walls of the rubber lining, and thebrush blank will then be strongly and effectively held in place ready yfor the drilling and filling operations, etc.

While I have described my invention above in detail I wish it to beunderstood that many changes may be made therein without departing fromthe spirit of the same. f

I claim: Y

1. A brush holding means comprising a carrier vhaving' an opening, aremovable brush holder carried in said opening, said holder having asocket for receiving the brush blank and adapted to surround the bristlere` ceiving portion of the brush blank.

2. A brush holding means comprising a removable brush holder having asocket for receiving the brush blank, said socket hav.

ing a lining of yielding material.

3. A brush holding means comprising a removable brush` holder having asocket for receiving the brush blank, said socket having tracted entryopening to hold the brush blank tightly in place.

6. A brush holding means comprising a removable brush holder having asocket for receiving the brush blank, said socket hav-k ing a lining ofyielding material provided with a brush blank retaining lip and acontracted entry opening to hold the brush blank tightly in place, theholder being provided also with lateral supporting springs at the,

entry opening.

7 A brush holding means comprising a removable brush holder open at theback and having a socket for receiving the brush blank, said holderbeing provided in its back in a recess open only towards the rear Withan inserted interchangeable plate containing countersinks.

8. In combination, a brush holding means comprising a removable brushholder having a socket for receiving the brush blank and a carrierhaving a tapered opening for receiving the holder and Wed ing it inplace.

9. In combination, a rush holding means comprising a removable brushholder having a socket for receiving the brush blank and a carrierhaving a tapered opening for receiving the holder and Wedging it inplace and a movable tapered gib in said opening for 'adjusting the sizeof the same and for accomplishing said Wedging.

10. In combination, a brush holding means comprising a removable brushholder having a socket for receiving the brush blank and a carrierhaving thin yielding Walls providing a tapered opening for receiving theholder.

l1. In combination, a brush holding means comprising a removable brushholder having a socket Jfor receiving the brush blank and a carrierhaving thin Walls providing a tapered opening for receiving the holderand Wedging it in place and a movable tapered gib in said opening foradjusting the size of the same and for accomplishing s aid Wedging.

In testimony that I claim the foregoing, I have hereunto set my handthis 20th day of May, 1929.

LEONARD B. TERHUNE.

